So happy to read that you feel good. I'm sure walking just adds to this. Was the trick of the Greek Philosophers I was told... to "air out the mind" and let your thoughts wander as well.
That first photo seems like an interesting coincidence, as I have been working on the layout for a new large oil painting. Its about freedom of thought, but where I really see the connection is the composition. I built my painting on a strict renaissance like composition with a grid of strong lines. Guess that's why @sean-kings picture really jumped at me. And of course, we both have a beautiful girl as the center of attention 💃👨🎨
Love that wall where your friends are posing!